检索结果-南通市图书馆

Redox Reactions Values of AlZn + Ag Eutectoid Chemical Composition

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science and Chemical Engineering 2014年第8期2卷 12-16页

作者： socorro valdez Jorge A. Ascencio Angélica Meneses Sid R. Casolco Facultad de Farmacia Universidad Autónoma del Estado de Morelos Cuernavaca México Instituto de Ciencias Físicas Universidad Nacional Autónoma de México Cuernavaca México Instituto Tecnológico y de Estudios Superiores de Monterrey Vía Atlixcáyotl México

The effect of IB element additions [Ag] on the corrosion behavior of AlZn alloy has been investigated. The potentiodynamic polarization curves revealed that the corrosion behavior of SSAl, SSZn and AgZn3 phases was significantly influenced by IB element content. The electrochemical investigations showed that the corrosion rate increased with the IB-element additions. Furthermore, it was also evidenced the formation of a passive layer for the highest Ag content alloys;the passivity of this layer could be broken due to the presence of the intermetallic compound (IMCs) AgZn3.

关键词： AlZn Alloys Ag Additions Polarization Curve AgZn3 Precipitate

Study of an Ionic Fluid on the Electrochemical Test of A36 Carbon Steel Ingot

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science and Chemical Engineering 2022年第2期10卷 29-43页

作者： socorro valdez Rodriguez Martin Ignacio Pech-Canul Hugo Rojas Oscar Sotelo Francisco Javier Rodríguez Araceli Espinoza-Vazquez Ociel Rodríguez Instituto de Ciencias Físicas-UNAM Cuernavaca Morelos México Centro de investigación y de Estudios Avanzadas del Instituto Politécnico Nacional Civestav-Saltillo Coahuila México Facultad de Ciencias Químicas e Ingeniería-UAEM Morelos México Departamento de Ingeniería Metalúrgica Facultad de Química-UNAM Ciudad de México México

An ionic fluid based on aromatic heterocyclic family constituted by 1,3-diazole groups was investigated. The purpose is to describe their electrochemical characteristics in order to identify the strategy to avoid the A36 carbon steel surface degradation by using electrochemical measurements. We found that the linear polarization resistance reveals an increasing value when the organic unsaturated cyclic ionic fluid was added to the corrosive electrolyte. The polarization curves and Tafel Extrapolation obtained to know the slopes tafel and the inhibitor efficiency from current density (icorr) shows a high efficiency inhibition value.

关键词： A36-Steel Ionic Fluid Electrochemical Degradation Tafel Extrapolation Linear Polarization Resistance Diazole Group Organic Inhibitor

Characterization of the negative carbon isotope shift in segment C2,its global implications as a harbinger of OAEla

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Earth Sciences 2017年第1期60卷 30-43页

作者： Jander socorro Florentin J-M. R. MAURRASSE Yosmel SANCHEZ-HERNANDEZ Department Earth and Environment Florida International University 11200 SW 8 Street Miami FL 33199 USA

Lower Cretaceous C-isotope records show intermittent negative/positive spikes, and consistent patterns of coevalchemostratigraphic curves thus document shifts that signal simultaneous responses of temporal changes in the global carbon reservoir. The standard pattern registered by the δ13Corg and δ13Ccarb in Lower Aptian sediments includes distinct isotope segments C1 to C8 （Menegatti et al., 1998）. In the E1 Pui section, Organy Basin, Spain, C-isotope segment C2 is the longest interval preceding segments C3-C6 associated with oceanic anoxic event la （OAE la）, and reveals a distinct negative shift of-1.8‰ to -2.23‰ defining the C-isotope pattern within that interval. Total inorganic carbon （TIC）, total organic carbon （TOC）, δ13Corg, microfacies, n-alkanes show no difference before, during, or after the negative inflection. The biomarkers indicate that organic matter （OM） mainly originates from algal/microbial sources because short-chain length homologues （〈 nCtg） dominate, nC2o through nC25 indicate some contribution from aquatic vegetation, but little from higher plants （〉nC20, as also suggested by the terrestrial/aquatic ratio ofn-alkanes or （TAR） = [（nf27＋nf29＋nC31）/（nC15＋nCt7＋rlCt9）] （averages 0.085）. We suggest that conjoint pulses of contemporaneous LIPs （Ontong Java） and massive explosive volcanism in northeast Asia, the Songliao Basin （SB-V）, best conform to plausible causes of the negative intra-C2 carbon isotopic excursion （CIE） at that time. Because of its apparent common occurrence the intra-C2 inflection could be a useful marker harbinger to the more pronounced CIE C3, the hallmark of OAE 1 a.

关键词： Oceanic Anoxic Event la (OAEla) Aptian Organy Basin Chemostratigraphy Pyrenees

Eosinophilic esophagitis in patients with esophageal atresia and chronic dysphagia

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2014年第47期20卷 18038-18043页

作者： Sirvart Kassabian Virginia Baez-socorro Thomas Sferra Reinaldo Garcia Department of Pediatric Gastroenterology Nutrition and HepatologyAkron Children’s HospitalAkronOH 44308United States Division of Pediatric Gastroenterology Nutrition and HepatologyRainbow Babies and Children’s HospitalClevelandOH 44106United States

Esophageal atresia(EA)is defined as a discontinuity of the lumen of the esophagus repaired soon after *** is a common symptom in these patients,usually related to stricture,dysmotility or peptic *** present 4 cases of patients with EA who complained of dysphagia and the diagnosis of Eosinophilic esophagitis(Eo E)was made,ages ranging from9 to 16 *** our patients were on acid suppression years after their EA repair,they presented with acute worsening of *** and/or barium swallow did not show stricture and biopsies revealed elevated eosinophil counts consistent with Eo *** of 4 patients improved symptomatically with the topical *** is important to note that all our patients have asthma and 3 out of 4 have tested positive for food *** of our patients developed recurrent anastomotic strictures that improved with the treatment of the Eo E.A previous case report linked the recurrence of esophageal strictures in patients with EA repair with Eo *** the Eo E was treated the strictures *** the other hand,based on our observation,Eo E could be present in patients without recurrent anastomotic *** appears to be a spectrum in the disease *** are suggesting that Eo E is a frequent concomitant problem in patients with history of congenital esophageal deformities,and for this reason any of these patients with refractory reflux symptoms or dysphagia(with or without anastomotic stricture)may benefit from an endoscopic evaluation with biopsies to rule out Eo E.

关键词： Eosinophilic esophagitis Esophageal atresia Tracheoesophageal fistula Dysphagia

Growth and nutrient accumulation of Brazil nut trees(Bertholletia excelsa) in agroforestry at different fertilizer levels

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Forestry Research 2015年第2期26卷 347-353页

作者： Gotz Schroth Maria do socorro Souza da Mota Maria Elizabeth de Assis Elias C.P. 513 Santarem PA 68109-971 Brazil Centro de Estudos Avanqados de Promoqao Social e Ambiental Av. Mendonqa Furtado 3979 Santarem PA 68040-050 Brazil Universidade Federal do Amazonas Manaus AM 69077-000Brazil

The Brazil nut tree（Bertholletia excelsa） is a frequent component of agroforestry systems in the Amazon because of its adaptation to nutrient-poor upland soils and multiple *** investigated the aboveground biomass production（kg dry weight）,nutrient uptake and requirements（N,P,Ca,Mg,K） of Brazil nut trees of different sizes grown under agroforestry conditions and fertilized at different *** of 70 experimental trees with different size were harvested and stem,branches and leaves were *** contents were determined for three trees of varying *** tree growth was fast,but variability was high,suggesting considerable potential for the improvement of this economically important *** trees responded to increased levels of fertilizer and lime with significantly increased foliar nutrient contents and growth,probably because of the improved availability of Mg and Ca for which the species seems to have a relatively high *** contrast to Brazil nut trees grown in forest or dense plantations,the agroforestry trees invested a substantial part of their biomass and nutrients in large branches and developed spreading *** improve stem form,reduce competition with associated crops for light and recycle nutrients,regular pruning of lower branches or planting arrangements that favor self-pruning are *** measures would also increase the recycling of Ca and Mg,large quantities of which are contained in the branches.

关键词： Allometric equation Amazon Nutrient competition Nutrient recycling Plant mineral nutrition Soil fertility Silviculture

15-Lipoxygenase inhibition of Commelina benghalensis,Tradescantia fluminensis,Tradescantia zebrina

在线全文

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Biomedicine 2014年第3期4卷 184-188页

作者： Cean socorro M.Alaba Christine L.Chichioco-Hernandez Institute of Chemistry College of ScienceUniversity of the PhilippinesDiliman Quezon CityPhilippines 1101

Objective:To evaluate the 15-lipoxygenase inhibitory activity of the methanol leaf extracts of Commelina benghalensis,Tradescantia fluminensis(***)and Tradescantia ***:The inhibitory activity was evaluated using a spectrophotometric assay by observing the increase in absorbance at 234 nm due to the formation of the product 13-hydroperoxyoctadecadienoic *** extracts were also tested for the presence of terpenoids,saponins,tannins,flavonoids,steroids,phenolic compounds,alkaloids and cardiac ***:All the extracts inhibited the action of 15-lipoxygenase at a concentration of 0.2μg/*** and Tradescantia zebrina exhibited higher than 50%inhibition with *** at 87.2%.*** was partitioned with ethyl acetate and hexane and their IC_(50)values were determined at 8.72μg/mL and 98.04μg/mL,***:*** is a potentially good source of 15-lipoxygenase inhibitors.

关键词： Inflammation Medicinal plants Plant extracts 15-Lipoxygenase

Doxycycline induces bone repair and changes in Wnt signalling

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Oral Science 2017年第3期9卷 158-166页

作者： kátia do nascimento gomes ana paula negreiros nunes alves paula góes pinheiro dutra glauce socorro de barros viana faculty of dentistry pharmacy and nursingfederal university of cearáFortalezaBrazil faculty of medicine federal university of cearáFortaleza Brazil

Doxycycline （DOX） exhibits anti-inflammatory and MMP inhibitory properties. The objectives of this study were to evaluate the effects of DOX on alveolar bone repair. Controls （CTL） and DOX-treated （10 and 25 mg. kg- 1） molars were extracted, and rats were killed 7 or 14 days later. The maxillae were processed and subjected to histological and immunohistochemical assays. Hematoxylin-eosin staining （7th day） revealed inflammation in the CTL group that was partly reversed after DOX treatment. On the 14th day, the CTL group exhibited bone neoformation, conjunctive tissue, re-epithelization and the absence of inflammatory infiltrate. DOX-treated groups exhibited complete re-epithelization, tissue remodelling and almost no inflammation. Picrosirius red staining in the DOXlO group （7th and 14th days） revealed an increased percentage of type I and III collagen fibres compared with the CTL and DOX25 groups. The DOXlO and DOX25 groups exhibited increases in osteoblasts on the 7th and 14th days. However, there were fewer osteoclasts in the DOXlO and DOX25 groups on the 7th and 14th days. Wnt-lOb- immunopositive cells increased by 130% and 150% on the 7th and 14th days, respectively, in DOX-treated groups compared with the CTL group. On the 7th day, Dickkopf （Dkk）-I immunostaining was decreased by 63% and 46% in the DOXlO and DOX25 groups, respectively. On the 14th day, 69% and 42% decreases in immunopositive cells were observed in the DOXlO and DOX25 groups, respectively, compared with the CTL group. By increasing osteoblasts, decreasing osteoclasts, activating Wnt lOb and neutralising Dkk, DOX is a potential candidate for bone repair in periodontal diseases.

关键词： alveolar bone loss bone diseases bone repair doxycycline Dickkopf-1 immunohistochemistry Wnt-lOb

Subclinical Hypothyroidism, Its Manifestations and Management a Case Report

在线全文

学校读者我要写书评

暂无评论

Open Journal of Internal Medicine 2023年第3期13卷 173-180页

作者： Pablo Sisiruca Gustavo Adolfo socorro Calderas Saint James School of Medicine Arnos Vale Saint Vincent and the Grenadines Jose Maria Vargas Medical School Faculty of Medicine Universidad Central de Venezuela Caracas Venezuela

Introduction: Thyroid states can be associated with psychiatric manifestations, be it hypothyroid, hyperthyroid or even euthyroid. The effect of depression is significant in subclinical hypothyroidism. Sometimes, its signs and symptoms are indistinguishable from Major Depressive Disorder. Our immunological system and early embryologic origins also play a role in the coexistence of other comorbidities like Pernicious Anemia. Case: A 35-year-old Hispanic female presented with significant low mood, somnolence, weight gain, increased hunger, cold intolerance and epigastric pain. It is important to note the variety of clinical manifestations of our hypothyroidism patient to understand its associations and help us with a better approach to treatment. Discussion: Standard approaches to treatment of Subclinical Hypothyroidism will depend mostly on laboratory findings such as TSH levels and free T4. Individualized therapy chosen for our patient was based on his mood symptoms, laboratory findings and coexistence of Pernicious Anemia. The use of daily 0.025 mg of levothyroxine, 10 mg of escitalopram oxalate and weekly injections of cyanocobalamin were treatments of choice. Conclusion: During follow up of our patient, we can conclude that Levothyroxine and Escitalopram Oxalate were able to improve hypothyroidism symptoms, reduce thyroglobulin and peroxidase antibodies and improve mood symptoms including cognitive functions. In addition to this, weekly cyanocobalamin injections were integrated into the management. As parietal cell antibodies decreased, gastrointestinal symptoms also disappeared. By addressing the concerns of our patient, we improved quality of care, and this is reflected in the patient’s wellbeing in physical and psychological.

关键词： Cyanocobalamin Escitalopram Oxalate Hashimoto’s Thyroiditis Levothyroxine Pernicious Anemia Polyglandular Syndrome

Exploring the Transferability of Large Supramolecular Assemblies to the Vacuum-Solid Interface

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2009年第7期2卷 535-542页

作者： Wei Xu Mingdong Dong Henkjan Gersen socorro Vázquez-Campos Xavier Bouju Erik Lægsgaard Ivan Stensgaard Mercedes Crego-Calama David NReinhoudt Trolle R.Linderoth Flemming Besenbacher Interdisciplinary Nanoscience Center(iNANO)and Department of Physics and Astronomy Aarhus UniversityNy Munkegade8000 Aarhus CDenmark Laboratory of Supramolecular Chemistry and Technology Materials Science and Technology of PolymersMESA+Institute for NanotechnologyUniversity of TwenteP.O.Box 2177500 AE EnschedeThe Netherlands Nanoscience group CEMES-CNRS29 rue Jeanne Marvig31055 ToulouseFrance Current address:Departments of Chemistry and Physics The Pennsylvania State UniversityUniversity ParkPennsylvania 16802USA Current address:Nanophysics and Soft Matter Group Department of PhysicsUniversity of BristolTyndall AvenueBS81TL BristolUK

We present an interplay of high-resolution scanning tunneling microscopy imaging and the corresponding theoretical calculations based on elastic scattering quantum chemistry techniques of the adsorption of a gold-functionalized rosette assembly and its building blocks on a Au(111)surface with the goal of exploring how to fabricate functional 3-D molecular nanostructures on *** supramolecular rosette assembly stabilized by multiple hydrogen bonds has been sublimed onto the Au(111)surface under ultra-high vacuum conditions;the resulting surface nanostructures are distinctly different from those formed by the individual molecular building blocks of the rosette assembly,suggesting that the assembly itself can be transferred intact to the surface by in situ thermal *** unanticipated result will open up new perspectives for growth of complex 3-D supramolecular nanostructures at the vacuum-solid interface.

关键词： Self-assembly surface nanostructures scanning tunneling microscopy supramolecular assembly hydrogen bonding